Heater



p 1938- w. c. STOLLBERG HEATER Filed Aug. 31, 1936 2 Sheets-Sheet l ZUaZZer 6f SZoZZZaerg *P 1938- w. c. STOLLBERG 2,131,334

HEATER Filed Aug. 31, 1936 2 Sheets-Sheet 2 '1 ELE- ZO'aZZ-er C. SZOZZZery Patented Sept. 27, 1938 UNITED STATES PATENT OFFICE The present invention relates to certain new and useful improvements in the oil feeding and controlling mechanism of burners such as that disclosed in Letters Patent #1,569,633 to Sheer, issued January 12, 1926.

Primarily the invention has for its object to .provide an improved, compact, control unit which .may be manufactured at low cost and contains a float operated primary valve, a metering valve also serves as a support for the burner.

. A common source of trouble in metering valves in general is the slowing down of, the oil flow through the same, which is-due to a-congestio-n or accumulation of foreign matter in the oilpassage; this in turn affects the size of the flame. It is therefore a further object of the invention to provide a metering valve device having means by which the fuel passage, from the fuel reservoir of the burner to the burner well, that is controlled by the metering valve, may be cleared or cleaned.

Again, with the oil feed arranged as in Letters Patent #1,569,633 aforesaid, the oil from the supply tank flows through the float controlled valve in a direction which tends to seat the valve. Experience has demonstrated. that this construction has a tendency to cause the valve to stick,- causing a rush of oil to the feed, whichin turn-causes, at intervals, high and low flames, a very undesira- 30 ble thing. In order to overcome this defect, the present invention also includes an improved way of passing the oil from the supply pipe to the reservoir of the burner in a direction such that the oil flowand gravity tend to unseat or open 35 the valve that is controlled by the float device.

Other objects will in part be obvious and in part generally pointed out hereinafter.

To the attainment of the aforesaid objects and ends, the invention still further resides in those novel details of construction, combination and arrangement of parts, all of which will be first fully described in the following detailed description, then be pointed out in the appended claims, reference being had to the accompanying drawings, in which:

Figure 1 is a top plan view of a heater or burner equipped with my invention.

Figure 2 is a vertical longitudinal section thereof on the line 2-2 of Figure 1.

Figure 3 is a vertical cross section on the line 3-3 of Figure 1.

Figure 4 is a detail cross section on the line 44 of Figure 3.

Figure 5 is a detail perspective view of the metering valve stem.

and priming device, and an overflow device, and

In the drawings, in which like numerals and letters of reference indicate like parts in all of the figures, A designates the oil flow control unit (center casting), B the tubular castings which extend from each side of the unit A, C the float valve body is provided with a valve seat to cooperate with the valve portion of the stem 9 15 througha slot in which passes the tandem bar 10. The bar I0 is pivoted at H to the stem. 9.

Floats 13 are located within the float cups C and are connected by rods 12 with the tandem bar I0, it being understood that the float cups C are in communication with the interior of the lateral tubular castings B that in turn communicate with the oil chamber 6. 7

I5 is an adapter and IS the member by which the supply pipe M'is connected to the center, unit A so as to deliver the oil supply to the duct I1.

3| is a sediment chamber formed in the center casting to one side of the oil chamber 6 and which communicates therewith through a duct in which is a metering valve body I8. A valve stem I9 cooperates with the body l 8 for conworks in a metering valve stem housing pipe 2| and carries on its outer end a knob 20 that is provided with a pointer 24 to cooperate with the dial 23. The metering valve stem l9 includes a piston-like portion 22 within the pipe 21.

25 designates the burner oil well feed tube which conveys the oil from sediment chamber 3| to the burner well F. The sediment chamber is provided with a drain plug 32, as shown.

The center casting is also provided with an overflow channel 26 in which is located an overflow tube 21 and an overflow tube compressing sleeve 29. The channel 26 is closed at its top by a screw plug 28 which may be screwed in to close the upper or outlet end of the overflow tube 21 when desired. The compression sleeve 29 serves to hold the overflow tube 21 in place.

The overflow oil is conveyed from the channel 26 through the overflow ofitake pipe 30 to some" suitable place.

The center unit A has parallel sides 33 while the tubular castings B have flanges 34 through which they are secured to the center casting by screws or any other suitable way.

Operation valve one full turn by means of the knob 20; open shut-off valve to permit oil to flow from tank to chamber 6; after the oil appears at the top of the burner oil well feed tube 25, it is best to wait about ten or fifteen minutes to be sure that the heater is in perfect conditionithe oil will actually creep up a little more, but should not more than cover the bottom of the burner oil Well, or cause the oil to run out of the overflow discharge pipe 30). If the heater is in proper condition the fuel may be ignited as soon as the wick 35 in the well has absorbed oil.

If the oil does not feed to the well properly it is probably due to a clogged passage. In that event unscrew the metering valve stem by turning the knob 20 to the left until it can be pulled out from the metering valve body I8 to the priming position; hold it in this position for about thirty seconds to allow ample time for the oil to fill the additional space caused by the outward movement of the piston 22; now gently lower the valve stem again turning the knob 20 to the right until the metering valve is shut off. This operation will cause a surplus of oil in the burner oil well for priming purposes and at the same time clear the passage. After igniting the fuel the size of the fiame may be varied by opening the metering valve more or less.

From the foregoing description, taken in connection with the accompanying drawings, it is thought the complete construction, operation and advantages of my invention will be readily understood by those skilled in the art.

I claim:

1. In a liquid fuel burner, a casting having a fuel receiving chamber, a sediment chamber, a duct between said chambers and a duct for passing fuel from said sediment chamber, a metering valve mechanism cooperating with said duct between said chambers to control the fiow of fuel from said receiving chamber to said sediment chamber, said casting including a neck, said metering valve mechanism including a metering valve pipe carried by said neck, a metering valve having a stem located in said pipe, and a threaded metering valve body having a seat, said metering valve being threaded into said body and means operative when said valve is unthreaded from said body for utilizing the valve stem as a priming piston.

2. In a liquid fuel burner, a casting having a fuel receiving chamber, a sediment chamber, a duct between said chambers and a duct for passing fuel from said sediment chamber, a metering valve mechanism cooperating with said duct between said chambers to control the flow of fuel from said receiving chamber to said sediment chamber, said casting including a neck, said metering valve mechanism including a metering valve pipe'carried by said neck, a metering valve having a stem located in said pipe, a threaded metering valve body having a seat, said metering valve being threaded into said body, and a piston carried by said stem and operable in said metering valve pipe when the metering valve is unscrewed from said metering valve body for purposes described.

3. In apparatus of the class described, a body having an oil chamber, and having a sediment chamber to one side of the oil chamber and extending above and below the level of the oil chamber, a removable plug closing the lower end of said sediment chamber, said body having an outlet port from the upper end of said sediment chamber, and having a passage between said oil chamber and said sediment chamber intermediate the ends of said sediment chamber, said body having a neck in alignment with said passage on the side of said sediment chamber opposite said passage, a metering-valvestem-housing pipe extending from said neck, a tubular metering-valve body secured at one end in said passage and filling the same and having a port with a valve seat adjacent said passage, the other end of said metering-valve body extending into but spaced from said neck and being internally threaded and being provided with a port for effecting communication with said sediment chamber, a metering-valve stem passing through said metering-va1ve-stem-housing pipe and into said metering-valve body and having threaded engagement with said metering-valve body and being provided with a portion to cooperate with said seat, said stem having a piston located within said housing-pipe, by virtue of which when said stem is unscrewed from said metering-valve body the stem may be'used as a plunger to force fluid from said sediment chamber for priming purposes. r WALTER C. STOLLBERG. 

